feat: display messages as terminal output

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a03397-4d51-7fd1-8ff2-946eb22ea2bc

tests/test_terminal_output.py

@@ -0,0 +1,45 @@
+import os
+import pty
+import select
+
+import pytest
+
+from tamq.terminal import (
+    TerminalOutputError,
+    format_comment,
+    terminal_frame,
+    write_terminal_output,
+)
+
+
+def test_comment_format_escapes_controls_and_prefixes_every_line():
+    assert format_comment("repo-a", "first\nsecond\x1b[31m", "m-1") == (
+        "#repo-a: first\n# second\\x1b[31m [m-1]"
+    )
+    assert terminal_frame("repo-a", "hello", "m-1") == (
+        "\r\n#repo-a: hello [m-1]\r\n"
+    )
+
+
+def test_terminal_output_reaches_pty_output_but_not_input():
+    master, slave = pty.openpty()
+    try:
+        tty_path = os.ttyname(slave)
+        write_terminal_output(tty_path, terminal_frame("repo-a", "hello", "m-1"))
+
+        readable, _, _ = select.select([master], [], [], 1)
+        assert readable == [master]
+        assert b"#repo-a: hello [m-1]" in os.read(master, 4096)
+        readable_input, _, _ = select.select([slave], [], [], 0)
+        assert readable_input == []
+    finally:
+        os.close(master)
+        os.close(slave)
+
+
+def test_terminal_output_rejects_non_pty_paths(tmp_path):
+    target = tmp_path / "ordinary-file"
+    target.write_text("untouched", encoding="utf-8")
+    with pytest.raises(TerminalOutputError, match="non-PTY"):
+        write_terminal_output(target, "message")
+    assert target.read_text(encoding="utf-8") == "untouched"